Alright, I was poking through the wiki as I occasionally like to do, when I noticed something rather jarring. There seem to be a couple conflicting lines...
"As far as gravity and aerodynamics are concerned, the fairy is still her "original" diminutive size"
"A fairy's "real" size is whatever their current size is."
The fairy being blown about by wind would imply that small and fragile is their "real size," since that's the size that dictates the fairy's physics.
Also, on the topic of this, if the fairy's physics are that of a smaller being, wouldn't a fairy be incredibly weighed down with humans in its stomach? If we imply that it gets caught up in the wind as if it were smaller, then eating one human would double its weight, three would triple, and so on. How would it even pick up a human without struggling? How do the fairies not bust their jaws when they have a human in their mouth? Do humans maintain their weight when they are shrunk?
In conclusion, I feel the line "As far as gravity and aerodynamics are concerned, the fairy is still her "original" diminutive size" causes far more problems than it solves, if it was even meant to solve anything to begin with.
Feel free to counter my point, contribute, agree, or shun this heathenish non-believer from the community forever.